JSON to TypeScript, Go & Rust
Instantly convert raw JSON into clean, typed interfaces and structs for TypeScript, Go (Golang), and Rust. 100% free, private, and runs in your browser.
- Smart type inference
- Nested struct generation
- No upload, no sign-up
- Runs in your browser
- No upload
- No sign-up
- Type inference
- Works offline
Related tools
Free AI and developer tools that run in your browser. Nothing uploaded, ever.
Why this tool is the best choice
Most generators only support TypeScript. We support TypeScript, Go, and Rust.
| Feature | TToolDeck | QuickType | Other Generators |
|---|---|---|---|
| Runs entirely in your browser | Yes | No | No |
| JSON never sent to a server | Yes | No | No |
| TypeScript, Go, and Rust support | Yes | Partial | No |
| Handles deeply nested objects | Yes | Yes | Partial |
| No account required | Yes | Yes | No |
| Cost | Free | Free | Paid |
How it works
- 1
Paste your JSON
Drop in your raw JSON payload. It can be an object or an array of objects.
- 2
Select your language
Choose TypeScript, Go, or Rust from the dropdown menu.
- 3
Copy your structs
The tool infers the data types and generates clean, nested interfaces with one click.
Everything you get for free
Smart Type Inference
Automatically detects strings, numbers, booleans, and nested arrays. Generates nested interfaces/structs for complex objects.
Go & Rust Support
Generates standard Go structs with JSON tags, and Rust structs with Serde derives for seamless integration.
100% Secure
Your JSON payloads might contain API keys or user data. Because this runs locally, your data never leaves your device.
PascalCase Conversion
Automatically converts JSON keys like "user_name" into proper `UserName` fields for Go and TypeScript.
Zero Latency
The entire parsing and generation process happens instantly in your browser. No API delays.
Clean Formatting
Output is beautified with correct indentation and spacing, ready to be pasted directly into your IDE.
What people use it for
API Integration
Quickly generate TypeScript interfaces when connecting your frontend to a new REST or GraphQL API.
Go Microservices
Paste a JSON response and instantly get the Go structs needed to unmarshal the payload.
Rust Backends
Generate Serde-compatible structs for your Rust API without manually typing out every field.
Mocking Data
Turn mock JSON files into typed code so your tests are strongly typed and catch errors early.
Database Seeding
Convert legacy JSON database dumps into typed models for your new ORM or Prisma schema.
Saving Time
Manually writing 50 interfaces for a complex API payload takes an hour. This tool does it in milliseconds.
Questions people ask
What languages does it support?
Currently, it generates TypeScript interfaces, Go structs, and Rust structs with Serde macros. Support for Python (Pydantic) and C# is planned.
How does it handle nested objects?
It recursively parses your JSON. If it finds an object inside an object, it generates a separate nested interface/struct and references it by name.
Is my JSON sent to a server?
No. The parsing and code generation run entirely in your browser using JavaScript. Your data is never transmitted or stored.
What happens if I have an array of strings?
It will correctly generate `string[]` for TypeScript, `[]string` for Go, and `Vec<String>` for Rust.
Does it handle null values?
Yes. Null values are mapped to `any` in TypeScript, `interface{}` in Go, and `serde_json::Value` in Rust, ensuring your code compiles.
Are the Go JSON tags lowercase?
Yes. The tool automatically takes the exact key from your JSON and applies it as a struct tag, e.g., `json:"user_id"`.
Why does it say "Invalid JSON"?
If your JSON is malformed (missing quotes, trailing commas), the parser will throw an error. You can use our JSON AI Fixer tool to clean it up first.
Can I use this commercially?
Yes, the tool is completely free and the output has no watermarks or attribution requirements.